US4773870A - Pull-out frame with a protective plate for a break-contact arrangement - Google Patents

Pull-out frame with a protective plate for a break-contact arrangement Download PDF

Info

Publication number
US4773870A
US4773870A US06/937,930 US93793086A US4773870A US 4773870 A US4773870 A US 4773870A US 93793086 A US93793086 A US 93793086A US 4773870 A US4773870 A US 4773870A
Authority
US
United States
Prior art keywords
pull
lifting lever
out frame
driver
protective plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US06/937,930
Other languages
English (en)
Inventor
Fred Sinnig
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Assigned to SIEMENS AKTIENGESELLSCHAFT reassignment SIEMENS AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SINNIG, FRED
Application granted granted Critical
Publication of US4773870A publication Critical patent/US4773870A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B11/00—Switchgear having carriage withdrawable for isolation
    • H02B11/24—Shutters or guards

Definitions

  • the present invention relates to a pull-out frame for a movably arranged switchgear with a stationary break-contact arrangement protected against electrical shorting by a protective plate, having the following features:
  • the protective plate is guided movably vertically by guides;
  • a device for transforming part of the travel distance of the switchgear into a lifting motion of the protective plate is provided;
  • the device comprises a driver acted upon by a restoring force, as well as a stationary supported lifting lever cooperating therewith;
  • the driver and the lifting lever have working surfaces facing each other.
  • a pull-out frame with these features is known from U.S. Pat. No. 4,443,676.
  • the force required for shifting the protective plate is transmitted here by a spring which is arranged between the driver and the lifting lever. Only if the protective plate is blocked do oppositely disposed working surfaces of the driver and the lifting lever come into contact with each other and limit the path of the driver. Because the force is transmitted to the lifting lever by means of the spring, it is difficult to maintain a given relationship between the motion of the driver and the motion of the protective plate.
  • the driver is guided at a side wall of the pull-out frame movably in a straight line in the direction of travel of the switchgear;
  • the working surfaces are designed as the sole means for transmitting force between the driver and the lifting lever, and the driver and the lifting lever have end pieces designed for cooperation in a form-locking manner for blocking the lifting lever in the rest condition of the device.
  • the form-locking connection prevents an excessive displacement of the protective plate if only one of customarily two identical devices provided is actuated.
  • the mentioned form-locking cooperation between the end parts of the driver and the lifting lever can be achieved by the provision that the end parts are designed engaging each other in hook-fashion and that the coverage of the end parts corresponds to a displacement of the driver which must be traveled starting from the rest condition until the working surfaces touch each other.
  • the driver following its working surface has a support surface for taking up without reaction a force acting on the lifting lever. It is achieved thereby that the weight of the protective plate in the lifted position does not exert a restoring force on the driver but is transmitted to the pull-out frame via the driver and its guiding elements. It has been found that the support surface can be formed by an outer surface of the hook-like end part facing the lifting lever.
  • the pivot of the lifting lever is arranged in a plane lying above the support surface of the driver and if the hook-like end parts of the driver and the lifting lever have mutually opposite end faces. In this manner a restoring force acting in addition to the weight of the protective plate is exerted from the restoring motion of the driver in order to return the former to the starting position, if the motion resistance of the protective plate is increased for any reason.
  • the driver is guided in the pull-out frame movably in a straight line.
  • the driver can be designed as extending in its rest position up to the forward edge of the pull-out frame on the operating side and may have near its end an opening for a protection member blocking the driver against actuation.
  • a padlock can be used in a manner known per se, the U-shaped bar of which is brought through the opening of the driver and an opening in the pull-out frame corresponding therewith.
  • FIG. 1 shows a pull-out frame with a device for actuating a protective plate in a simplified perspective view, with a low-voltage circuit breaker indicated schematically;
  • FIG. 2 shows the pull-out frame according to FIG. 1 with the protective plate lifted, without the circuit breaker.
  • the pull-out frame 1 shown in the figures serves for accommodating a low-voltage circuit breaker 2, on the back side of which bar-like contacts 3 and 4 are arranged. Three upper contacts 3 and three further, lower contacts 4 are arranged in parallel rows, an upper contact 3 and a lower contact 4 belonging to one pole of the circuit breaker.
  • the circuit breaker 2 is provided with base angles 5 which are suitable for sliding on a bottom plate of the pull-out frame 1 or on guides specially provided for this purpose.
  • a break contact arrangement 7 which is arranged on the back side of the pull-out frame 1 and contains the break contact blocks designed to cooperate with the contacts 3 and 4.
  • Suitable for this purpose are, for instance, break contact blocks according to U.S. Pat. No. 4,486,636.
  • the break contact arrangement 7 is preceded by a protective plate 10 which has openings 11 for the upper contacts 3 of the circuit breaker 2 and lower openings 12 for the lower contacts 4.
  • a protective plate 10 which has openings 11 for the upper contacts 3 of the circuit breaker 2 and lower openings 12 for the lower contacts 4.
  • guide slots 15 and 16 for the vertical guidance of the protective plate 10 are arranged.
  • the device to be described in the following serves to cause an automatic lifting of the protective plate 10, when the circuit breaker 2 is inserted in the direction of the arrow 17; that the contacts 3 and 4 of the circuit breaker 2 can pass through the openings 11 and 12 of the protective plate 10 and come into engagement with the plate contact blocks located therebehind.
  • a driver 20 is provided at each of the side walls 13 and 14 of the pull-out frame 1, which has two elongated holes for guidance on a straight line on posts 22 inserted into the side walls.
  • a tension spring 24 is hooked as the restoring spring for the driver 20.
  • an extension 25 protruding into the interior of the pull-out frame 1 is fastened which cooperates with a suitable countersurface of the circuit breaker 2.
  • a stop 26 arranged for this purpose is shown here in FIG. 1 above the base angle 5.
  • the driver 20 is provided with a hook-like end piece 27 which forms an entrance opening 30, an end face 32 pointing toward the front edge 31 of the pull-out frame 1 as well as an outer support surface 33.
  • the end part 27 further has a backward working surface 34.
  • a lifting lever 35 is pivoted on a pin 36.
  • This pivot bearing is located in a plane disposed above the support surface 33 of the end part 27 of the driver 20, in order to bring about cooperation, yet to be explained, between the driver 20 and the lifting lever 35 in the case of a disturbance.
  • the lifting lever 35 likewise has a hook-like end part 37 which forms an entrance opening 40 pointing toward the interior of the pull-out carrier 1 as well as an end surface 41. Opposite the entrance opening 40, the lifting lever 35 has a working surface 42 which cooperates with the working surface 34 of the driver 30. With its rear end part 43, each lifting lever 35 engages a lateral recess 44 of the protective plate 10.
  • the protective plate 10 By tilting the lifting lever 35 about its pivot pin 36, the protective plate 10 can be lifted from the rest position shown in FIG. 1 into the operating position shown in FIG. 2.
  • the openings 11 and 12 of the protective pivot 10 arrive here via the protective strips 45 indicated by dashed lines in FIG. 1, to permit the passage of the contacts 3 and 4 of the circuit breaker 2 to the break contact arrangement 7.
  • FIG. 2 shows the parts in their end position. The position of the circuit breaker 2 is marked here by a dashed-dotted line 47.
  • the working surface 42 of the lifting lever 35 is designed so that it slides off the working surface 34 of the driver 20 as soon as the protective plate 10 has reached its operating position. Then, the underside 48 of each lifting lever 35 gets to the support surface 33 of each driver 20, whereby the weight of the protective plate 10 is taken up without reaction to the position of the driver 20. For returning the device into the starting position shown in FIG. 1, the power of the coil springs 24 alone is the governing factor.
  • the drivers 20 follow at first the movement of the circuit breaker 2 under the influence of the force of the coil springs 24.
  • the end part 43 of the lifting levers 35 slides off the support surfaces 33 of the drivers 20 until the working surfaces 34 and 42 come into contact again. This corresponds to the position of the circuit breaker 2, in which its contacts 3 and 4 have left the break contact arrangement 7 as well as the openings 11 and 12 of the protective plate 10. Due to the design of the working surfaces 34 and 42, the lifting levers 35 now execute again on a short part of the travel distance of the circuit breaker 2 the tilting motion required for lowering the protective plate 10.
  • each driver 20 enters the entrance opening 40 of each lifting lever 35, while the end part 37 of each lifting lever 35 arrives in the entrance opening 30 of the corresponding driver 20.
  • the formlocking connection is re-established, by which a displacement of the protective plate 10 independent of the drivers 20 is prevented.
  • the drivers 20 are designed so that they extend to the front edge 31 of the pull-out frame 1 and have an opening 50 there.
  • a further opening 51 is provided in each of the side walls 13 and 14 of the pull-out frame 1.
  • the openings 50 and 51 correspond to each other if the drivers 20 are in the rest position according to FIG. 1. If now the shackle of a padlock 52 is brought through the openings 50 and 51 as indicated in FIG. 1, the respective driver 20 is blocked against actuation. At the same time, the padlock 52 forms an obstacle against the insertion of the circuit breaker 2. Additional security can be achieved by a further padlock at the side walls 13.
  • the device for operating the protective plate 10 can be used independently of any special design of the pull-out frame 1.
  • the circuit breaker 2 can be of any suitable type of design since it is merely necessary that an edge or working surface cooperating with the extension 25 of the drivers 20 is provided. A separate stop corresponding to the stop 26 in FIG. 1 is therefore not absolutely necessary.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Breakers (AREA)
  • Trip Switchboards (AREA)
US06/937,930 1985-12-13 1986-12-04 Pull-out frame with a protective plate for a break-contact arrangement Expired - Fee Related US4773870A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3544667 1985-12-13
DE19853544667 DE3544667A1 (de) 1985-12-13 1985-12-13 Einschubrahmen mit einer schutzplatte fuer eine trennkontaktanordnung

Publications (1)

Publication Number Publication Date
US4773870A true US4773870A (en) 1988-09-27

Family

ID=6288684

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/937,930 Expired - Fee Related US4773870A (en) 1985-12-13 1986-12-04 Pull-out frame with a protective plate for a break-contact arrangement

Country Status (5)

Country Link
US (1) US4773870A (pt)
EP (1) EP0235492B1 (pt)
JP (1) JPS62141906A (pt)
BR (1) BR8606092A (pt)
DE (2) DE3544667A1 (pt)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2285183A (en) * 1993-12-22 1995-06-28 Square D Co Shrouding busbars
US6031191A (en) * 1995-01-10 2000-02-29 Siemens Aktiengesellschaft Sliding frame with a break contact arrangement
US20040246664A1 (en) * 2001-10-22 2004-12-09 Nils Anger Mounting structure for an electric switch
WO2005027288A1 (de) * 2003-09-11 2005-03-24 Siemens Aktiengesellschaft Verriegelbarer shutter für einschubrahmen von niederspannungs-leistungsschaltern
US20060118397A1 (en) * 2004-12-06 2006-06-08 Joerg-Uwe Dahl Switching apparatus having a withdrawable-part rack and a lockable power circuit breaker
US20070137991A1 (en) * 2005-12-21 2007-06-21 Kashyap Pavan R Shutter locking system for draw-out circuit breakers and method of assembly thereof
EP1962397A1 (en) * 2007-02-23 2008-08-27 General Electric Company Shutting locking system for draw-out circuit breakers and method of assembly thereof
US20090095610A1 (en) * 2006-05-05 2009-04-16 Trondheim Energiverk Nett As Method and device for maintenance of high-voltage switchgear with voltage
US20090128999A1 (en) * 2007-11-15 2009-05-21 Siemens Aktiengesellschaft Closing apparatus for a withdrawable-part rack
US20090139843A1 (en) * 2007-12-04 2009-06-04 Mark Anthony Serrano Device and method for switching electrical energy
US20090255790A1 (en) * 2008-04-15 2009-10-15 Soundararajan Narayanasamy Racking mechanism for a circuit breaker
CN1829021B (zh) * 2005-02-28 2012-05-16 三菱电机株式会社 控制中心的功能单元及其制造方法
CN104103948A (zh) * 2013-04-12 2014-10-15 技嘉科技股份有限公司 门盖机构
US20140308830A1 (en) * 2013-04-12 2014-10-16 Giga-Byte Technology Co., Ltd. Door mechanism assembly
US20160248231A1 (en) * 2013-09-30 2016-08-25 Schneider Electric USA, Inc. Snap-in shutter system for rack out circuit breakers

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1264165B1 (it) * 1993-04-21 1996-09-17 Sace Spa Dispositivo di bloccaggio di sicurezza per un interruttore sezionabile
DE10120749C1 (de) 2001-04-23 2002-07-11 Siemens Ag Schutzeinrichtung gegen Berühren spannungsführender Kontakte in einem Einschubrahmen eines Schaltgerätes
DE102007054295A1 (de) * 2007-11-09 2009-05-14 Siemens Ag Schutzvorrichtung gegen Berühren elektrischer Leiter in einer Stromverteilereinheit
DE102008046881A1 (de) * 2008-09-11 2010-03-18 Ids-Technology Gmbh Modul zum elektrischen Energieabgriff von Stromschienen

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3614350A (en) * 1970-07-20 1971-10-19 Gen Electric Shutter arrangement for a switchgear unit
FR2098742A5 (pt) * 1970-07-24 1972-03-10 Merlin Gerin
JPS54121943A (en) * 1978-03-14 1979-09-21 Toshiba Corp Closed switchboard
JPS54131737A (en) * 1978-04-04 1979-10-13 Toshiba Corp Closed power board
EP0061129A1 (en) * 1981-03-18 1982-09-29 Hitachi, Ltd. Shutter device for metal-enclosed switchgear
US4443676A (en) * 1981-11-18 1984-04-17 General Electric Company Interchangeable shield arrangement for a circuit breaker compartment
US4447682A (en) * 1982-02-16 1984-05-08 General Electric Company Isolation shields for a 2500-4000 amp circuit breaker compartment
DE8512452U1 (de) * 1985-04-26 1985-06-20 Concordia Sprecher-Schaltgeräte GmbH, 7024 Filderstadt Steuerbare Verschlußvorrichtung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5951202A (ja) * 1982-08-25 1984-03-24 Teijin Ltd 除草剤

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3614350A (en) * 1970-07-20 1971-10-19 Gen Electric Shutter arrangement for a switchgear unit
FR2098742A5 (pt) * 1970-07-24 1972-03-10 Merlin Gerin
JPS54121943A (en) * 1978-03-14 1979-09-21 Toshiba Corp Closed switchboard
JPS54131737A (en) * 1978-04-04 1979-10-13 Toshiba Corp Closed power board
EP0061129A1 (en) * 1981-03-18 1982-09-29 Hitachi, Ltd. Shutter device for metal-enclosed switchgear
US4443676A (en) * 1981-11-18 1984-04-17 General Electric Company Interchangeable shield arrangement for a circuit breaker compartment
US4447682A (en) * 1982-02-16 1984-05-08 General Electric Company Isolation shields for a 2500-4000 amp circuit breaker compartment
DE8512452U1 (de) * 1985-04-26 1985-06-20 Concordia Sprecher-Schaltgeräte GmbH, 7024 Filderstadt Steuerbare Verschlußvorrichtung

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2285183A (en) * 1993-12-22 1995-06-28 Square D Co Shrouding busbars
US6031191A (en) * 1995-01-10 2000-02-29 Siemens Aktiengesellschaft Sliding frame with a break contact arrangement
US20040246664A1 (en) * 2001-10-22 2004-12-09 Nils Anger Mounting structure for an electric switch
US7078634B2 (en) * 2001-10-22 2006-07-18 Siemens Aktiengesellschaft Mounting structure for an electric switch
US20090000926A1 (en) * 2003-09-11 2009-01-01 Buxton Clifford A Lockable Shutter for Withdrawable Racks of Low-Voltage Power Circuit Breakers
WO2005027288A1 (de) * 2003-09-11 2005-03-24 Siemens Aktiengesellschaft Verriegelbarer shutter für einschubrahmen von niederspannungs-leistungsschaltern
US7903393B2 (en) 2003-09-11 2011-03-08 Siemens Aktiengesellschaft Lockable shutter for withdrawable racks of low-voltage power circuit breakers
US7141747B2 (en) * 2004-12-06 2006-11-28 Siemens Aktiengesellschaft Switching apparatus having a withdrawable-part rack and a lockable power circuit breaker
US20060118397A1 (en) * 2004-12-06 2006-06-08 Joerg-Uwe Dahl Switching apparatus having a withdrawable-part rack and a lockable power circuit breaker
CN1829021B (zh) * 2005-02-28 2012-05-16 三菱电机株式会社 控制中心的功能单元及其制造方法
US20070137991A1 (en) * 2005-12-21 2007-06-21 Kashyap Pavan R Shutter locking system for draw-out circuit breakers and method of assembly thereof
US7348505B2 (en) 2005-12-21 2008-03-25 General Electric Company Shutter locking system for draw-out circuit breakers and method of assembly thereof
US20090095610A1 (en) * 2006-05-05 2009-04-16 Trondheim Energiverk Nett As Method and device for maintenance of high-voltage switchgear with voltage
US7649149B2 (en) * 2006-05-05 2010-01-19 Trondheim Energiverk Nett As Method and device for maintenance of high-voltage switchgear with voltage
EP1962397A1 (en) * 2007-02-23 2008-08-27 General Electric Company Shutting locking system for draw-out circuit breakers and method of assembly thereof
US7869194B2 (en) 2007-11-15 2011-01-11 Siemens Aktiengesellscahft Closing apparatus for a withdrawable-part rack
US20090128999A1 (en) * 2007-11-15 2009-05-21 Siemens Aktiengesellschaft Closing apparatus for a withdrawable-part rack
US8809705B2 (en) 2007-12-04 2014-08-19 General Electric Company Device and method for switching electrical energy
US20090139843A1 (en) * 2007-12-04 2009-06-04 Mark Anthony Serrano Device and method for switching electrical energy
US7821775B2 (en) 2008-04-15 2010-10-26 General Electric Company Racking mechanism for a circuit breaker
US20090255790A1 (en) * 2008-04-15 2009-10-15 Soundararajan Narayanasamy Racking mechanism for a circuit breaker
CN104103948A (zh) * 2013-04-12 2014-10-15 技嘉科技股份有限公司 门盖机构
US20140308830A1 (en) * 2013-04-12 2014-10-16 Giga-Byte Technology Co., Ltd. Door mechanism assembly
US9059536B2 (en) * 2013-04-12 2015-06-16 Giga-Byte Technology Co., Ltd. Door mechanism assembly
CN104103948B (zh) * 2013-04-12 2016-05-18 技嘉科技股份有限公司 门盖机构
US20160248231A1 (en) * 2013-09-30 2016-08-25 Schneider Electric USA, Inc. Snap-in shutter system for rack out circuit breakers
US9711954B2 (en) * 2013-09-30 2017-07-18 Schneider Electric USA, Inc. Snap-in shutter system for rack out circuit breakers

Also Published As

Publication number Publication date
JPS62141906A (ja) 1987-06-25
EP0235492A1 (de) 1987-09-09
BR8606092A (pt) 1987-09-15
EP0235492B1 (de) 1990-05-16
JPH0357683B2 (pt) 1991-09-03
DE3671333D1 (de) 1990-06-21
DE3544667A1 (de) 1987-06-19

Similar Documents

Publication Publication Date Title
US4773870A (en) Pull-out frame with a protective plate for a break-contact arrangement
KR970004462B1 (ko) 인출형 차단기의 안전셔터장치
US4703137A (en) Electric switchgear with a pull-out frame and a switching device that can be inserted therein
EP2228878B1 (en) Circuit breaker with apparatus for preventing withdrawing or inserting of carriage of circuit breaker
CA2046767C (en) Bi-stable interlock arrangement for molded case circuit breakers
US4754367A (en) Electric switchboard cell having a positioning drive for a movably arranged switchgear and locking device for switchboard cell door
US5019676A (en) Auxiliary operator for circuit interrupting apparatus with interlock between switch and housing
EP1135787B1 (en) Fuse handler
US5912444A (en) Switch racking mechanism with interlock
US7064283B2 (en) Device for fixing a power circuit breaker in an insertion rack
US3319020A (en) Handle interlock for electrical switching devices
US7067747B2 (en) Protective unit to prevent contact with conductive contacts in a withdrawable space of switching device
US2919327A (en) Contact structure for electromagnetic actuator
US4724288A (en) Switchboard cell for receiving switchgear movable by positioning drive
GB2063355A (en) Interlocking drawers
US4823231A (en) Current tapping device disconnectable from an omnibus bar distribution column
US4394056A (en) Drawer locking mechanism
NL8303434A (nl) Elektrische schakelaar.
US4757169A (en) Electric switchgear having guiding means serving for positioning within a switchboard cell
KR20160063560A (ko) 진공차단기의 인터록 장치
CN213717453U (zh) 手车开关安全保护装置和开关柜
JPH08218702A (ja) 宅配ボックス、その施錠装置およびその受領印装置
CN210296268U (zh) 一种断路器
CN115039195A (zh) 真空断路器用联锁装置
KR19990062957A (ko) 폐쇄배전반의 셔터장치

Legal Events

Date Code Title Description
AS Assignment

Owner name: SIEMENS AKTIENGESELLSCHAFT, MUNCHEN, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SINNIG, FRED;REEL/FRAME:004647/0961

Effective date: 19861127

Owner name: SIEMENS AKTIENGESELLSCHAFT,GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SINNIG, FRED;REEL/FRAME:004647/0961

Effective date: 19861127

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 4

FPAY Fee payment

Year of fee payment: 8

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 20000927

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362